When executing the attached simple xpcshell test using the ./mach xpcshell-test simple_test.js command, the console prints a number of warnings: From _tests: Kept 17699 existing; Added/updated 5; Removed 0 files and 0 directories. 0:17.79 INFO | Using at most 32 threads. 0:18.34 [6064] WARNING: Couldn't get the user appdata directory. Crash events may not be produced.: file c:\\mozilla-source\\toolkit\\crashreporter\\nsExceptionHandler.cpp, line 2158 0:18.40 0:18.40 TEST-INFO | (xpcshell/head.js) | test MAIN run_test pending (1) 0:18.41 0:18.41 TEST-INFO | (xpcshell/head.js) | test run_next_test 0 pending (2) 0:18.41 0:18.41 TEST-INFO | (xpcshell/head.js) | test MAIN run_test finished (2) 0:18.41 0:18.41 TEST-INFO | (xpcshell/head.js) | running event loop 0:18.41 TEST-INFO | c:/mozilla-source/objdir-ff-debug/_tests/xpcshell/toolkit/components/filewatcher/tests/xpcshell/test_watcher.js | Starting dumb_test 0:18.41 0:18.41 TEST-INFO | (xpcshell/head.js) | test dumb_test pending (2) 0:18.42 0:18.42 TEST-INFO | (xpcshell/head.js) | test run_next_test 0 finished (2) 0:18.42 0:18.42 TEST-INFO | (xpcshell/head.js) | test run_next_test 1 pending (2) 0:18.42 0:18.42 TEST-INFO | (xpcshell/head.js) | test dumb_test finished (2) 0:18.42 0:18.42 TEST-INFO | (xpcshell/head.js) | test run_next_test 1 finished (1) 0:18.42 0:18.42 TEST-INFO | (xpcshell/head.js) | exiting test 0:18.43 0:18.43 TEST-INFO | (xpcshell/head.js) | No (+ 0) checks actually run 0:18.53 [6064] WARNING: Leaking the RDF Service.: file c:/mozilla-source/rdf/build/nsRDFModule.cpp, line 165 0:18.57 [6064] WARNING: '!compMgr', file c:/mozilla-source/xpcom/glue/nsComponentManagerUtils.cpp, line 59 0:18.57 [6064] WARNING: OOPDeinit() without successful OOPInit(): file c:\\mozilla-source\\toolkit\\crashreporter\\nsExceptionHandler.cpp, line 2588 0:18.57 [6064] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file c:\\mozilla-source\\xpcom\\base\\nsTraceRefcnt.cpp, line 143 0:18.57 [6064] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file c:\\mozilla-source\\xpcom\\base\\nsTraceRefcnt.cpp, line 143 0:18.57 nsStringStats 0:18.57 => mAllocCount: 2567 0:18.57 => mReallocCount: 378 0:18.57 => mFreeCount: 2567 0:18.57 => mShareCount: 9125 0:18.57 => mAdoptCount: 138 0:18.57 => mAdoptFreeCount: 138 0:18.57 => Process ID: 6064, Thread ID: 5584 0:18.58 TEST-PASS | c:/mozilla-source/objdir-ff-debug/_tests/xpcshell/toolkit/components/filewatcher/tests/xpcshell/test_watcher.js | test passed (time: 776.000ms) 0:18.62 INFO | Result summary: 0:18.62 INFO | Passed: 1 0:18.62 INFO | Failed: 0 0:18.62 INFO | Todo: 0 0:18.62 INFO | Retried: 0

Presumably fixed.

I don't think this is about RDF per se. RDF is just one place that apparently asserted if you leaked.

The only leak report shown in that output is for the RDF service. With the RDF service gone, nothing else to go on, and this bug being 4 years old, I'm not sure there's much point in keeping it open.

Well, there are specific steps to reproduce the leak given in comment 0. I hacked up my local build to always log leak information to a file, and then added a new test to this directory and ran it (you have to update the generator syntax). We actually do leak a single nsTArray, but that sounds like a different issue. I also didn't see the message about RDF leaking (this is an m-c from about a week or so ago). Anyways, I guess closing it is fine after all.

(In reply to Andrew McCreight [:mccr8] from comment #4) > I also didn't see the message about RDF leaking (this is an > m-c from about a week or so ago). That's because you and khuey fixed that warning about 4 years ago in bug 1048435 :)